While the Saudi' are Sunni (Actually the Wahhabi Sect of Sunnism), the area around the Persian gulf (Where most of the Arabian oil is) is dominated by Shiites. Thus while Saudi Arabia is NOT Shiite, the area of Arabia that the US is most concerned about is.
http://www.arabicnews.com/ansub/Daily/Day/050920/2005092024.htmlhttp://www.saudi-us-relations.org/defense/islamic-extremism-terrorism.htmlAs to the Wahhabi Sect of Sunnism, Wahhabi makes the Shiites of Iran look like radical liberals. Iran women can hold jobs, get elected to office and even drive a car. That is NOT possible in Wahhabi dominated Saudi Arabia. Furthermore the House of Saud is itself WAHHABI.
http://www.saudi-us-relations.org/articles/2006/ioi/060131-usip-saudi-iraq-6.htmlhttp://www.meta-religion.com/Extremism/Islamic_extremism/wahhabism.htmhttp://www.meforum.org/article/535http://www.saudi-american-forum.org/Newsletters2004/SAF_Item_Of_Interest_WahhabiIslam1.htmThus you have TWO radical groups in play in the Persian Gulf and Iraq. To a degree both are working together against the US, but also to a degree they OPPOSE the present rulers of the States of the Persian Gulf.
This has caused some problem, bin Laden for example is a Wahhabi, but the only MOSLEM country standing up to the US in the Persian Gulf is Iran (Which is Shiite). Wahhabism permits its follows to attack any country which claims to be Moslem but does not completely implement Moslem law. Thus bin Laden's attack on Saudi Arabia since the US first set up camps during the First Gulf war (Moslem law PROHIBITS the use of NON-Moslem Troops). Thus bin laden and Al Queda oppose the US and any of its allies in the region.
On the other hand, bin Laden as a good Wahhabi oppose the Shiites of Iran. Thus these two groups oppose each other, but they are persistent reports of bin Laden and Iran working together. This appears more an Alliance of Convenience (i.e. against the common enemy of the US) than a joining of these two groups together.
Any my point was NOT to say that when dictatorships fall (and all do sooner or later) the people who will take over are the people who are the best organized. In Western Europe that appeared to be the Communist until the US and the Catholic Church worked together to defeat the Communist (and Stalin told the Western Communists to NOT do any Guerrilla actions let the US attack Russia in retaliation). The Catholic Church was important for while it had supported Hitler against the Communists, it had also opposed Hitler (except in his dealings with the Communists). Stalin decision not to provoke the US neutralized the Communists and thus the present pro-US, anti-Communist governments of Western Europe (With strong Socialist tendency to minimized the call of the Communists for Social Revolution).
Notice the Catholic Church itself had little power in these Government, but the Church did NOT need to have power, its power was it had the organization (both local and international) to provide a framework to form political parties to take over the Government. Other international Groups provided this service (For example the Social Democrats) but my point was the groups that did take over had existed BEFORE WWII and were able to survive WWII with some sort of political organization so that some sort of political control be set up when the political control of the previous Government has ended (In the case of the US and UK's liberation of Western Europe, as the US and UK forces took France) and in the Case of Germany as the Nazi regime fell apart in April and May 1945.
My point was it was NOT the ideology that was important, but the fact the group had and effective organization that could be used to set up a political system. Now the Organization was often the result of the Ideology (and in that aspect ideology of the group was important) but the key was the effective international, national and local organization of the group when the opportunity to take over presented itself. Right now the two best organized groups are the Shiites and Al Queda. Neither is the centralized control of a national Government, but do to each having their own ideology, they are willing to form up into groups when and if such groups can be formed. Thus it was the Shiites who took over Iran as the Shah lost power, the liberals tried to rule but had no longer support for they had no local presence, while the Imams of Iran did have local presence. The liberals of Iran could count of their Friends in the West, but they had no one close by to support them like the Shiites in the rest of the Region supported the Shiites of Iran at that time. The Communists seems to have some support in Iran, but lost out to the better organized and lead Shiites.
Thus I can see a problem in the Mid-East for the next 20 years. With oil peaking production peaking in that time period, the present rulers will use their increase wealth to buy off the lower classes and the Shiite Leadership, but sooner or later each country will have to face a drop in income do to lower production of oil (You can't sell what you don't have). With the drop in Income the Ruling Families will try to hold onto their present life style and to do so, cut services to the lower classes which will lead to revolution and these radical groups taking over. One of the reason for the expansion of Al Queda during the 1990s was the FALL of oil prices in the 1990s, this reduced the revenue to the House of Saud at the time when the population of Arabia was expanding rapidly. This lead to a drop in the standard of Living of most Arabians which lead to disenchantment with the House of Saud and an embrace of Al Queda. The increase in the price of oil since 9/11 seems to have stabilized most of the Persian Gulf States, I have my doubts it will last long.